Maurice Joly (1829-1878), a French satirist.
He wrote a political satire attacking the French emperor, which was later plagiarized to create a notorious hoax.
His 1864 'Dialogue in Hell Between Machiavelli and Montesquieu' attacked Napoleon III and said nothing about Jews at all; decades later it was copied to manufacture the fraudulent 'Protocols of the Elders of Zion.'
His work is the proof that the Protocols are a forgery, tracing the famous hoax back to a completely unrelated source.